Automotive brake



March 29, N272 A. J. CHAPBN AUTOMOTIVE- BRAKE Filed 1160.15, 1923ATTORNEY Civ ALBERT J. CHAPIN. 0F OAKLAND, CLIFCRNIA, ASSXGNQR TO THEWESTIIJ'GHOUSE AIB. BRAKE COMPANY, 0F VILMERDING, PENNSYLVANIA, A.CORE'ORALON Oli rENNsa infame.

aofromorivr. Beans.

Application filed December 15, 1923. Serial No. $80,863.-

r.lhis invention relates to a fluid pressure brake construction adaptedmore particular ly to be applied to the iront wheels ot a motor vehicle.

The principal object of my invention is to provide ari-improved liuidpressure brake construction of the above character.

ln the accomlvianying drawing; Fig. l is a section through the axis oithe king pin of a vehicle front wheel construction. showing the improvedfluid prcssure'biakc ap plied thereto; Fig. 2 a plan view. in part,ofthe construction shown in Fig. l; and Fig. 3 an inner lace view of theconstruction shown in Fig. l.

As shown in the drawing, the front wheel construction may comprise theusual parts including a front axle l. a 'front wheel 2, a steeringknuckle 3 mounted on a king pin 4, between the forked ends of the axlel, and having the usual spindle 5, upon which the front wheel ismounted.

A brake drum (l having an internal friction face is secured to thefront' wheel l and mounted in said drum is a brake head 7 having anarcuate face adapted to frictionally engage the friction face ot thedrum 6.

rllhe king pin #l is splined to and therefore rotates with the steeringknuckle 3 and sf'id pin extends upwardly and ou the upward extension issplined a slidingr slccvc 8. so that said sleeve is tree to slide onthe. 'king iin but is prevented from rotatingr thereon. The sleeve 8 isprovided with arms 9 which are pivotally connected to links 10, saidlinks beine; pivotall),Iv connected to the end portions ot the brakingmember 'a'.

The sleeve 8 also carries a bracket arm 11 for supporting' a brakechamber 1 2.l Said brake chamber may comprisellanged casing members i3and 14. between which is clamped a tlexible diaphragnr l5. A pipe 16 isconnected to one side ot' the diaphragm and a pressure plate 2l engagesthe other side thereof. A rod 1T is secured to said pressure plate. theouter end of which is pivotally connected to a lever arm 18. Said leverarm '1S is mounted to t'reel rotate on the kiner pin l between thesleeveS and a collar lf) which is splincd to the king pin. A. camportion 2O is provided ou the lever arm 18 and said cam portion normallyengages in a corresponding notch in the collar 19 when the parte are inrelease position.

In operation, when lluid under pressure is supplied through pipe 16 tothe flexible diaphragm l5, the diaphragm is forced outwardly and thediaphragm rod ll' operates to rotate the cam lever 18. The rotation oi.'lever 18 causes the cam 2O to ride up out ot' the notch in the collar19, therein. lifting the sleeve 8 and the arms 9. The links'lO aretherefore raised so that the brakingl inembcr T is forced intofrictional engagement with the drum 6 and thus an application it thebrakes is effected.

When tluid is released from the diaN phragm 15, the partsare returned torelease position so as to ell'ect the release of the brakes, the releasemovement being etlected by lthe usual release spring 22 assisted byspring' 23.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent7 is:-

l. ln an automotive frontwhcel brake, the combination with a front`wheel steering knuekle having a king pin, of a bra-ke drum associatedwith the front wheel, a braking member coacting with said drum. alaterally extending bracket arm secured to said king pin, and a brakechamber carried by .said bracket and operatively connected to saidbraking member.

In an automotive front wheel brake. the combination with a front -wh-celsteering knuckle having' a king` pin, of a brake drum associated withthe 'front wheel, a braking member enacting' with said drum, a Sleevemounted on said king pin, links operativel)v connected to said sleeveJlor operating said braking member. a brake chamber carried by saidsleeve, and a cam member for operating' said sleeve and operativclj7connected to said brake chamber.

3. lu nn automotiveront wheelbrake,

the combination with a front wheel steering knuckle havingr a kinfr pin,of a brake drum associated with the front wheel, a brakingY iemberconcting with said drum. a sleeve slidnbly mounted on said kine pin.links carried by said sleeve and operatively con nected to said brakingmember1 a cum lever '.rotatabl;7 mounted on said kin;r pin for operatingsaid sleeve. and a brake chamber rotatabljvv movable with said king',`piu and operatively connected to said com lever.

4. ln an automotive trent wheel brake.,

the combination with a front wheel steering- (iti knuckle having a kingpiu, of a bra-ke opereting sleeveA slidably and non-rotatably mounted onsaid king pin, a cam lever rotatably :mounted on sind king pnforoperating seid sleeve, a. brake chamber carried by seul sleeve andcontaining a, flexible diaphragm operable by luid under pressure,

:1nd a diaphragm rod operated by seid liapbragm and operativelyconnected to said cam lever.

In testimony whereof I have hereunto svt my hand.

` ALBERT J CHAPN

